Abstract

The orientation relationship between the crystallographic axes and the principal axes of the optical indicatrix for a Li6Gd(BO3)3 single crystal grown by the Czochralski method was determined. The polarized absorption spectra, polarized fluorescence spectra, and fluorescence decay curve of Nd3+:Li6Gd(BO3)3 were measured at room temperature. On the basis of the Judd–Ofelt theory and the Fuchtbauer–Landenburg formula, the spectroscopic parameters of Nd3+:Li6Gd(BO3)3 relevant to laser properties were obtained and compared with other borate laser crystals. A primary laser output of about 130mW at 1056nm with the slope efficiency of 13% was obtained under a Ti:sapphire laser pumping.

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